. >> a therapy already used with adults shows promise in treating children with advanced leukemia. this young girl shares her experience. >> and holiday return. >> it's my pleasure to return this to you. >> jeff: tony guida watches as a famous hotel welcomes back long missing items, no questions asked. >> this is the captioning sponsored by cbs this is the "cbs evening news." >> good evening, everyone, i'm jeff glor. syrian rebels tonight are ramping up their adult-- assault on damascus and a legalo the country's largest city. the u.n. peace envoy met with u.n. and russian diplomats trying to broker a cease-fire. at the same time there is growing concern tonight over al qaeda's influence in the rebel ranks. david martin is at the pentagon. >> reporter: video said to show the aftermath of a syrian air strike provides graphic evidence of a life-and-death battle which high level diplomats say is bad and getting worse. despite its air power the assad regime appears increasingly on the defensive against rebel forces which according to israel's ambassador to the u.s. include a growing number of rad

from the military that anything other than dialogue among the political parties would "force us into a dark tunnel with disastrous consequences." but the bickering is likely to go on. morsi still needs to form a but sadly seetion, says khalid is not acting as a president. >> reporter: the muslim brotherhood's head office was wrecked by opposition supporters an act former is supreme leader mahdy akef called criminal. "what is happening in egypt is not egypt" he said. st process. opposition supporters have laid virtual seize to the residential palace and zereatening further unrest if the president doesn't back down. what can the opposition do about this? andhe opposition is helpless and is divided and is without division. >> reporter: that leads the streets for what passes as political discourse and the army arreferee. it's a role they may have to tll for some time. morsi is insisting a referendum a held next weekend to vote on a constitution written by his party and its islamist allies. mistopposition wants one drawn ts ohat represents everyone's interests. maurice. >> dubois: a

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